Lipitor is a statin drug that is commonly used to treat high cholesterol levels, while blood thinners are used to prevent blood clots. According to the sources provided, there are some potential side effects that may occur when taking Lipitor and blood thinners together.

Firstly, Lipitor may increase the risk of bleeding when taken with blood thinners, such as warfarin. This is because both drugs can affect the way blood clots. Patients taking these medications together should be monitored closely for signs of bleeding, such as bruising or blood in the urine or stool [2].

Secondly, statins like Lipitor can cause muscle pain and weakness, a condition known as myopathy. This can be exacerbated when taken with blood thinners, particularly those that contain aspirin. Patients taking these medications together should report any muscle pain or weakness to their doctor immediately [3].

Finally, both Lipitor and blood thinners can cause liver damage. Patients taking these medications together should have their liver function monitored regularly to ensure that it is functioning properly [1].

In conclusion, patients taking Lipitor and blood thinners together should be aware of the potential side effects and be monitored closely by their doctor. Signs of bleeding, muscle pain or weakness, and liver damage should be reported immediately. It is important to discuss any concerns or questions with a healthcare provider before starting any new medications.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/LIPITOR
[2] https://www.mayoclinic.org/diseases-conditions/high-blood-cholesterol/in-depth/statin-side-effects/art-20046013
[3] https://my.clevelandclinic.org/health/treatments/22282-statins